ST-2100 Hifi Stereo


The ST-2100 is a Hybrid Tube and Class-D Hifi Stereo amp with a subminiature preamp and class-D power amp,
delivering big power and high-end sound quality in a small package.

The Preamp is a high quality stereo turntable tube preamp, using two subminiature preamp tubes per channel.
These special purpose tubes were developed by the military to operate smoothly under extreme conditions with maximum life span.

The tubes unique musical sound qualities make vinyl records come alive with a simple design and RIAA equalization
for perfect sound reproduction and frequency balance.
Their wide frequency range and lively dynamics distinguishes them from the more common 9 pin tubes.

The Phono Preamp has two matching stereo channels with a phono input and three tube buffered Line Level inputs for use with CD, iPod, iPhone, iPad,
Cassette or any other unit with Line Level or lower output.

The separate power supply feeds both power amp and the tube preamp with four filter stages and DC filament supply in quiet no-noise operation.

Micro Tubes (subminiature) - Small size, but sizable warmth, presence, power and transparency.
These special purpose tubes were developed by the military to operate smoothly under extreme conditions with maximum life span.

Hifi Stereo Class-D Power Amp

100 Watts @ 4 ohm - 50 Watts @ 8 ohm

Phono Preamp with RIAA Equalization

3x Tube buffered Line Level inputs

Point-to-point gold plated turret terminal wiring

Gold plated RCA connectors

Hermetically sealed Paper/Oil capacitors

Quiet power supply

CD - Cassette - iPod - iPhone - iPad

Class-D 100 Watts/4 ohm - 50 Watts/8 ohm
Subminiature preamp
RIAA Phono RCA Stereo input = 60 dB gain
3x Line RCA Stereo inputs = 20 dB gain
Line RCA Stereo output = 400 ohm Z
Quiet power supply and
Paper-oil capacitors
Carbon Composition resistors

100/120/220/240VAC (50/60Hz)
Handmade in USA
This Stereo amp provides highest sound quality and fidelity and evokes the pure joy of listening to music.
It's simple, original design reveals the recorded signal in its purest form.

The quiet and stable power supply delivers sound reproduction true to the input signal without distortion and less than 0.1 % THD

The modern class-D power amp truly sounds like a big tight tube amp, revealing perfectly the tube preamp quality without loss.
Producing 100 Watts into 4 ohm speakers and 50 Watts into 8 ohm speakers.

You cannot find another Tube Hifi amp and hear high-end quality music at this price.

User Feedback:


I was just able to pick up the amp on Thursday and have been playing it ever since.
The experience has been wonderful and I am like a kid pulling out all my records to see what they sound like now.
Great craftsmanship and execution, I am really enjoying it so far.

Thanks Chris,
Ty Ohanneson